[Nek5000-users] Stochastic inflow boundary condition using previous time step velocities?
nek5000-users at lists.mcs.anl.gov
nek5000-users at lists.mcs.anl.gov
Thu Jul 29 15:27:45 CDT 2010
Hello,
I am trying to code a stochastic inlet boundary condition for a backward
facing step case. I am using the PN/PN-2 formualtion at Re=28,000.
In this b.c., we use previous time step values to initialize the
fluctuations and final fluctuations are done using the stochastic model.
ufluct = u(t-dt) - umean
...........
...........
...........
ux = uprime + umean
To implement this in subroutine USERBC, I am facing trouble to use the
previous time step values.
Are they stored in VXLAG(LX1,LY1,LZ1,LELV,1)? How can I call those
velocities in USERBC? And can I do this?
ufluct = vxlag(1,1,1,1,1) - umean
Thanks,
Harish.
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